this is a purely GlassFish related issue. Just configure an existing http-listener to use SSL (assuming you already have your certificate) or create a new one if you want to keep the plain http port open, restart, and that's it. APEX Listener doesn't have additional settings, it's really just a plain JEE application using what the container (GlassFish) is offering.
If you are unsure about how to configure your http-listener, I recommend reading the GlassFish manual or use Google (where you'll find tons of tutorials/blog posts/... about that).